Figure 1. (a) Occurrence of Merguia rhizophorae along the western Atlantic. The red circle shows Vaza- Barris estuarine region of Sergipe State, northeastern coast of Brazil and blue circle shows the previous records of the species (obtained from literature and Global Biodiversity Information Facility – GBIF; http://www.gbif.org); (b–c) Sampling site in a fringe mangrove forest; (d) Excavation of the burrows using a spatula; (e) Burrows (white arrows) inhabited by mud shrimps (yellow arrow) distributed on the sediment of the intertidal zone; (f) lateral view of Merguia rhizophorae (Rathbun 1900). Photo credits: Douglas F.R. Alves.